U.S. patent application number 14/913826 was filed with the patent office on 2017-09-14 for backlight module and liquid crystal display.
The applicant listed for this patent is Shenzhen China Star Optoelectronics Technology Co., Ltd.. Invention is credited to Hu HE.
Application Number | 20170261678 14/913826 |
Document ID | / |
Family ID | 55147357 |
Filed Date | 2017-09-14 |
United States Patent
Application |
20170261678 |
Kind Code |
A1 |
HE; Hu |
September 14, 2017 |
BACKLIGHT MODULE AND LIQUID CRYSTAL DISPLAY
Abstract
A backlight module including a light guide plate including a
first surface and an incident surface disposed opposite to each
other, a second surface and a third surface disposed opposite to
each other and connected between the first surface and the incident
surface, and a light emitting surface and a reflecting surface
disposed opposite to each other and connected to the incident
surface. The first surface, the second surface and the third
surface; a light source disposed adjacent to the incident surface
and a reflecting sheet including a flat part and a first bent part
formed by bending a first side of the flat part, wherein the flat
part is disposed under the reflecting surface, and the first bent
part is attached to the first surface. A liquid crystal display
having the backlight module is also disclosed.
Inventors: |
HE; Hu; (Shenzhen,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Shenzhen China Star Optoelectronics Technology Co., Ltd. |
Shenzhen |
|
CN |
|
|
Family ID: |
55147357 |
Appl. No.: |
14/913826 |
Filed: |
January 13, 2016 |
PCT Filed: |
January 13, 2016 |
PCT NO: |
PCT/CN2016/070825 |
371 Date: |
February 23, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02B 6/0088 20130101;
G02B 6/0055 20130101; G02F 2001/133314 20130101; G02B 6/0065
20130101; G02F 1/133615 20130101; G02B 6/0085 20130101; G02F
1/133308 20130101 |
International
Class: |
F21V 8/00 20060101
F21V008/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 20, 2015 |
CN |
201510685179.3 |
Claims
1. A backlight module comprising: a light guide plate including an
incident surface, a first surface, a second surface, a third
surface, a light emitting surface and a reflecting surface,
wherein, the first surface is opposite to the incident surface, the
second surface and the third surface are opposite to each other and
each connected between the incident surface and the first surface,
the light emitting surface and the reflecting surface are opposite
to each other and each connected to the incident surface, the first
surface, the second surface and the third surface; a light source
disposed adjacent to the incident surface; and a reflecting sheet
including a flat part and a first bent part formed by bending a
first side of the flat part, wherein the flat part is disposed
under the reflecting surface, and the first bent part is attached
to the first surface.
2. The backlight module of claim 1, wherein the reflecting sheet
further comprises a second bent part formed by bending a second
side of the flat part, wherein the second bent part is attached to
the second surface.
3. The backlight module of claim 2, wherein the reflecting sheet
further comprises a third bent part formed by bending a third side
of the flat part, wherein the third bent part is attached to the
third surface.
4. The backlight module of claim 3, wherein the first bent part and
the first surface and/or the second bent part and the second
surface and/or the third bent part and the third surface are
attached to each other via a double-sided tape.
5. The backlight module of claim 1, wherein a plurality of lattice
points are disposed on the reflecting surface.
6. The backlight module of claim 2, wherein a plurality of lattice
points are disposed on the reflecting surface.
7. The backlight module of claim 3, wherein a plurality of lattice
points are disposed on the reflecting surface.
8. The backlight module of claim 4, wherein a plurality of lattice
points are disposed on the reflecting surface.
9. The backlight module of claim 5, wherein a plurality of
double-sided tapes are disposed on the flat part in staggered
positions with the lattice points, and the flat part is attached to
the reflecting surface via the plurality of double-sided tapes.
10. The backlight module of claim 6, wherein a plurality of
double-sided tapes are disposed on the flat part in staggered
positions with the lattice points, and the flat part is attached to
the reflecting surface via the plurality of double-sided tapes.
11. The backlight module of claim 7, wherein a plurality of
double-sided tapes are disposed on the flat part in staggered
positions with the lattice points, and the flat part is attached to
the reflecting surface via the plurality of double-sided tapes.
12. The backlight module of claim 8, wherein a plurality of
double-sided tapes are disposed on the flat part in staggered
positions with the lattice points, and the flat part is attached to
the reflecting surface via the plurality of double-sided tapes.
13. The backlight module of claim 1, wherein the light guide plate
is made of glass.
14. The backlight module of claim 1, wherein the light source is a
light emitting diode.
15. The backlight module of claim 1, wherein the backlight module
further comprises: a heat radiator including a bearing part and a
mounting part formed by bending a side of the bearing part, wherein
an end of the flat part adjacent to the incident surface and an
incident end of the light guide plate are hosted on the bearing
part such that the mounting part is adjacent to the incident
surface, and the light source is mounted on a surface of the
mounting part facing the incident surface.
16. A liquid crystal display comprising a liquid crystal panel and
a backlight module disposed opposite to each other, wherein the
backlight module comprises: a light guide plate including an
incident surface, a first surface, a second surface, a third
surface, a light emitting surface and a reflecting surface,
wherein, the first surface is opposite to the incident surface, the
second surface and the third surface are opposite to each other and
each connected between the incident surface and the first surface,
the light emitting surface and the reflecting surface are opposite
to each other and each connected to the incident surface, the first
surface, the second surface and the third surface; a light source
disposed adjacent to the incident surface; and a reflecting sheet
including a flat part and a first bent part formed by bending a
first side of the flat part, wherein the flat part is disposed
under the reflecting surface, and the first bent part is attached
to the first surface.
Description
TECHNICAL FIELD
[0001] The present disclosure relates to liquid crystal display
technical field, and more particularly, to a backlight module and a
liquid crystal display (LCD).
BACKGROUND ART
[0002] With the evolution of photoelectric and semiconductor
technologies, the flourishing development of a flat panel display
is driven, and in various flat panel displays, liquid crystal
displays (LCDs) have been applied to many aspects of the production
and living, because of having various superior characteristics,
such as high space utilization, low power consumption, no radiation
and low electro-magnetic interference or the like.
[0003] With the development of the liquid crystal display
technology, the markets are increasingly seeking the thinning of
the electronic devices, for example, the current electronic
devices, such as a laptop, a mobile phone, a tablet computer, or
the like, which need a liquid crystal display, are made thinner and
thinner. Thus, the liquid crystal display needs to be made thinner
and thinner. Currently, a major and urgent issue needed to be
resolved is how to provide a thin liquid crystal display.
SUMMARY
[0004] In order to achieve the above purpose, the present
disclosure provides a backlight module including: a light guide
plate including an incident surface, a first surface, a second
surface, a third surface, a light emitting surface and a reflecting
surface, wherein, the first surface is opposite to the incident
surface, the second surface and the third surface are opposite to
each other and each connected between the incident surface and the
first surface, the light emitting surface and the reflecting
surface are opposite to each other and each connected to the
incident surface, the first surface, the second surface and the
third surface; a light source disposed adjacent to the incident
surface; and a reflecting sheet including a flat part and a first
bent part formed by bending a first side of the flat part, wherein
the flat part is disposed under the reflecting surface, and the
first bent part is attached to the first surface.
[0005] Further, the reflecting sheet further includes a second bent
part formed by bending a second side of the flat part, wherein the
second bent part is attached to the second surface.
[0006] Further, the reflecting sheet further includes a third bent
part formed by bending a third side of the flat part, wherein the
third bent part is attached to the third surface.
[0007] Further, the first bent part and the first surface and/or
the second bent part and the second surface and/or the third bent
part and the third surface are attached to each other via a
double-sided tape.
[0008] Further, a plurality of lattice points are disposed on the
reflecting surface.
[0009] Further, a plurality of double-sided tapes are disposed on
the flat part in staggered positions with the lattice points, and
the flat part is attached to the reflecting surface via the
plurality of double-sided tapes.
[0010] Further, the light guide plate is made of glasses.
[0011] Further, the light source is a light emitting diode.
[0012] Further, the backlight module further includes a heat
radiator including a bearing part and a mounting part formed by
bending a side of the bearing part, wherein an end of the flat part
adjacent to the incident surface and an incident end of the light
guide plate are hosted on the bearing part such that the mounting
part is adjacent to the incident surface, and the light source is
mounted on a surface of the mounting part facing the incident
surface.
[0013] The present disclosure further provides a liquid crystal
display having the above-described backlight module.
[0014] The advantageous effects of the present disclosure are as
follows: the backlight module according to the present disclosure
decreases its thickness by not using a back plate; and when the
backlight module provided by the present disclosure is applied to
the liquid crystal display, a thickness of the liquid crystal
display may be greatly decreased, so that the liquid crystal
display satisfies the currently thin-type requirement.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and/or other aspects, characteristics and
advantages of the embodiments in the present disclosure will become
more apparent from the following description, taken in conjunction
with the accompanying drawings in which:
[0016] FIG. 1 is a side view and top view diagram illustrating a
light guide plate according to an embodiment of the present
disclosure;
[0017] FIG. 2 is a top view diagram illustrating a reflecting sheet
according to an embodiment of the present disclosure;
[0018] FIG. 3 is a stereo diagram illustrating the assembling of
the reflecting sheet and the light guide plate according to an
embodiment of the present disclosure;
[0019] FIG. 4 is a structural schematic diagram illustrating a
backlight module according to an embodiment of the present
disclosure; and
[0020] FIG. 5 is a structural schematic diagram of a liquid crystal
display according to an embodiment of the present invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0021] Embodiments of the present disclosure will be described in
detail below by referring to the accompany drawings. However, the
present disclosure can be embodied in many different forms, and
should not be construed as being limited to the specific
embodiments set forth herein. Rather, these embodiments are
provided for explaining the principle and actual application of the
present disclosure, thus other skilled in the art can understand
various embodiments and various amendments which are suitable for
specific intended applications of the present disclosure.
[0022] In the drawings, thicknesses of layers and regions are
exaggerated for clarity. The same reference numerals are used to
indicate the same elements throughout the drawings.
[0023] It will be understood that although the terms "first",
"second", "third", etc. may be used herein to describe various
elements, these elements should not be limited by these terms.
These terms are merely used to distinguish one element from
another.
[0024] FIG. 1 is a side view and top view diagram illustrating a
light guide plate according to an embodiment of the present
disclosure. In FIG. 1, the left diagram is a top view diagram, and
the right diagram is a side view diagram.
[0025] Referring to FIG. 1, the light guide plate 10 is a flat-type
light guide plate, but the present disclosure is not limited
thereto. For example, the light guide plate 10 may be a
wedge-shaped light guide plate. The light guide plate 10 includes
six surfaces having four side surfaces, and a top surface and a
bottom surface disposed opposite to each other and each connected
to the four side surfaces. In the present embodiment, it is
designated that one of the four side surfaces is an incident
surface 11; the side surface opposite to the incident surface 11 is
a first surface 12; two side surfaces opposite to each other and
connected between the incident surface 11 and the first surface 12
are a second surface 13 and a third surface 14, respectively; the
top surface is designated to be a light emitting surface 15; and
the bottom surface is designated to be a reflecting surface 16.
Certainly, the definition here is merely a kind of exemplary
embodiment, and the present disclosure is not limited thereto.
[0026] FIG. 2 is a top view diagram illustrating a reflecting sheet
according to an embodiment of the present disclosure.
[0027] Referring to FIG. 2, a reflecting sheet 30 according to the
embodiment of the present disclosure includes a flat part 31, and a
first bent part 32, a second bent part 33 and a third bent part 34
formed by respectively bending three sides of the flat part 31.
Before assembling the reflecting sheet 30 and the light guide plate
10, a double-sided tape 70 is disposed on each of the first bent
part 32, the second bent part 33, and the third bent part 34,
respectively. Certainly, in the present disclosure, the
double-sided tape 70 may be replaced with other adhesives, such as
glue or the like. In addition, a plurality of double-sided tapes 70
may be disposed on the flat part 31, and the specific function will
be described below.
[0028] FIG. 3 is a stereo diagram illustrating the assembling of
the reflecting sheet and the light guide plate according to an
embodiment of the present disclosure.
[0029] Referring to FIG. 3, the flat part 31 is disposed under the
reflecting surface 16, and the first bent part 32, the second bent
part 33 and the third bent part 34 are attached to the first
surface 12, the second surface 13 and the third surface 14 via the
double-sided taps 70, respectively. As a result, a bonding firmness
of the reflecting sheet 30 and the light guide plate 10 may be
enhanced. Certainly, it should be understood that the effect of
fixing the reflecting sheet 30 and the light guide plate 10 may
also be achieved by bonding a bent part of the reflecting sheet 30
and a side surface of the light guide plate 10, or bonding two bent
parts of the reflecting sheet 10 and two side surfaces of the light
guide plate 10. For example, the first bent part 32 is bonded to
the first surface 12; in this case, the reflecting sheet 30 may not
include the second bent part 33 and the third bent part 34.
[0030] FIG. 4 is a structural schematic diagram illustrating a
backlight module according to an embodiment of the present
disclosure.
[0031] Referring to FIG. 4, a backlight module 1 according to the
embodiment of the present disclosure includes: a light guide plate
10, a light source 20, a reflecting sheet 30, a heat radiator (or
referred to as a heat sink) 40, a glue frame 50, and three optical
film sheets 60.
[0032] In particular, the heat radiator 40 as a whole is in an "L"
shape, including a bearing part 41 and a mounting part 42 formed by
bending a side of the bearing part 41. After assembling the light
guide plate 10 and the reflecting sheet 30 in the manner shown in
FIG. 3, a side of the flat part 31 of the reflecting sheet 30
adjacent to the incident surface 11 and an incident end of the
light guide plate 10 (i.e., an end having the incident surface 11)
are sequentially hosted on the bearing part 41. As a result, the
mounting part 42 is adjacent to the incident surface 11.
[0033] The light source 20 may be a light emitting diode LED, but
the present disclosure is not limited thereto. The light source 20
is disposed on a surface of the mounting part 42 facing the
incident surface 11 such that the light source 20 is adjacent to
the incident surface 11.
[0034] The three optical film sheets 60 are sequentially disposed
on the light emitting surface 15 in a direction far away from the
light emitting surface 15 to improve light emitted from the light
emitting surface 15. It should be understood that the number of the
optical film sheets 60 of the present disclosure is not limited to
three, which may be set according to practical situations.
[0035] The glue frame 50 is disposed on the three optical film
sheets 60. The glue frame 50 is firmly fixed to the heat radiator
40 such that the three optical film sheets 60, the light guide
plate 10, the light source 20 and the reflecting sheet 30 are fixed
between the glue frame 50 and the heat radiator 40.
[0036] Further, in the present embodiment, a plurality of lattice
points 80 are disposed on the reflecting surface 16, wherein shapes
of the lattice points 80 are not specifically defined in the
present embodiment. The flat part 31 of the reflecting sheet 30 may
be attached to the reflecting surface 16 via the plurality of
double-sided tapes 70 disposed on the flat part 31 when it is
disposed opposite to the reflecting surface 16, thereby further
improving the bonding firmness of the reflecting sheet 30 and the
light guide plate 10. Here, it should be explained that the
double-sided tapes 70 on the flat part 31 and the lattice points 80
are disposed in staggered positions.
[0037] In the present embodiment, the light guide plate 10 is made
of transparent glass. Since the strength of the glass is much
greater than that of the PMMA or MS or the like, the backlight
module 1 according to the embodiment of the present disclosure may
not include a back plate, and is supported merely by the strength
of the light guide plate 10. Thus, in comparison with the prior
art, when the backlight module 1 does not include the back plate, a
thickness of the liquid crystal display formed by assembling the
backlight module 1 and a liquid crystal panel will be greatly
decreased, thereby satisfying a thin-type requirement of the liquid
crystal display.
[0038] FIG. 5 is a structural schematic diagram of a liquid crystal
display according to an embodiment of the present disclosure.
[0039] Referring to FIG. 5, the liquid crystal display according to
the embodiment of the present disclosure includes: a liquid crystal
panel 2, and the above backlight module 1 disposed opposite to the
liquid crystal panel 2, wherein the backlight module 1 provides
uniform surface light source to the liquid crystal panel 2 such
that the liquid crystal panel 2 may display images by using the
uniform surface light source.
[0040] Although the present disclosure has been shown and described
with reference to the special exemplary embodiments, those skilled
in the art will understand that various changes in form and details
may be made therein without departing from the spirit and scope of
the invention as defined by the appended claims and its
equivalents.
* * * * *